<template>
  <div>
    <ul>
      <li v-for="(item, index) in arr" :key="index">
        {{ item }} <button @click="del(index)">删除</button>
      </li>
    </ul>
    <button @click="add">生成</button>
  </div>
</template>

<script>
export default {
  // name: "",
  components: {},
  props: {},
  data() {
    return {
      arr: [1, 2, 3],
    };
  },
  computed: {},
  watch: {},
  created() {},
  methods: {
    add() {
      const a = Math.floor(Math.random() * 100);
      this.arr.push(a);
    },
    del(index) {
      this.arr.splice(index, 1);
    },
  },
};
</script>

<style scoped></style>
